import_csv · MCP Database Server MCP: Risk & Policy

WHAT IT DOES

What import_csv does on MCP Database Server

AI agents use import_csv to create or update resources in MCP Database Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Database Server environment.

WHY IT NEEDS A POLICY

Why import_csv needs a policy

The tool creates or modifies database tables by importing CSV data. This is reversible (data can be updated or removed later), making it a Write operation rather than Destructive. Severity is medium because an agent misusing this could overwrite existing tables or corrupt data schemas, but the impact is limited to a single database and reversible through standard database operations.

From the tool's definition Tool description states it 'Import[s] data from a CSV file into a database table' and 'Creates the table if it doesn[t exist]', indicating data creation and modification operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

import_csv Rate-limited

import_csv stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "import_csv": {
      "limits": [
        {
          "counter": "import_csv_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Database Server, so you can run agents against it safely.

FAQ

Questions about import_csv

What does the import_csv tool do? +

Import data from a CSV file into a database table. Creates the table if it doesn. It is categorised as a Write tool in the MCP Database Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on import_csv? +

Register the MCP Database Server MCP server in PolicyLayer and add a rule for import_csv: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP Database Server. Nothing to install.

What risk level is import_csv? +

import_csv is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit import_csv? +

Yes. Add a rate_limit block to the import_csv rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block import_csv completely? +

Set action: deny in the PolicyLayer policy for import_csv. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides import_csv? +

import_csv is provided by the MCP Database Server MCP server (jakubbuskiewicz/mcp-test). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.